First 3D printing of the double cap

The first step to improve the prototype of the double cap was to define the optimal proportion of the double cap connector. To recall, the connector function is to pierce an aluminum seal to allow the flow of the bioreporter into the water sample, after having started to screw the two vials together.

The next step was to model the connector with Blender (open source software). Note that we choose a thickness of 0.5mm for the whole part, but it can be increased to 1mm, depending on the 3D printer accuracy.

Then we export a .stl file, format for the 3D printer software. Here are the files for the connector :